build(deps): bump taskcluster-taskgraph in /taskcluster

Bumps [taskcluster-taskgraph](https://github.com/taskcluster/taskgraph) from 7.4.0 to 8.0.1.
- [Release notes](https://github.com/taskcluster/taskgraph/releases)
- [Changelog](https://github.com/taskcluster/taskgraph/blob/main/CHANGELOG.md)
- [Commits](taskcluster/taskgraph@7.4.0...8.0.1)

---
updated-dependencies:
- dependency-name: taskcluster-taskgraph
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

taskcluster/requirements.txt

@@ -517,9 +517,9 @@ taskcluster==64.2.0 \
     --hash=sha256:2379debec6c47581b5156d218f77edb6b75006d518a376f0f4b78ad5774dedfa \
     --hash=sha256:c2219e0d5b6d2470a3185590d1e42a7b5390d504e0db54e66ee0cd3b5e0d4eae
     # via -r requirements.in
-taskcluster-taskgraph==7.4.0 \
-    --hash=sha256:2dd814ca94d64d2663facbcb55bda18e9748ed142ef551803bba71a3e793f2ee \
-    --hash=sha256:457bcf5bcef0202435cdf01b8cbc67a97fc755d647e6d5c4f4ae69f00d9e98ad
+taskcluster-taskgraph==8.0.1 \
+    --hash=sha256:14500bc703f64eb002c0cd505caaf2d34ffc0ae66d109b108e738661da1ae09c \
+    --hash=sha256:21387537bbebab2a7b1890d03e20e49379bdda65efd45ca7fb8d01f5c29e1797
     # via -r requirements.in
 taskcluster-urls==13.0.1 \
     --hash=sha256:5e25e7e6818e8877178b175ff43d2e6548afad72694aa125f404a7329ece0973 \